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Title:
Evolution of the Dark Matter Distribution with 3-D Weak Lensing
Authors:
Bacon, D. J.; Taylor, A. N.; Brown, M. L.; Gray, M. E.; Wolf, C.; Meisenheimer, K.; Dye, S.; Wisotzki, L.; Borch, A.; Kleinheinrich, M.
Publication:
Gravitational Lensing Impact on Cosmology, IAU Symposium, vol. 225. Edited by Yannick Mellier and Georges Meylan, ISBN 0521851963. Cambridge, UK: Cambridge University Press, 2005., p.37-42
Publication Date:
06/2005
Origin:
CUP
Comment:
ISBN: 0521851963
DOI:
10.1017/S1743921305001778
Bibliographic Code:
2005IAUS..225...37B

Abstract

We present a direct detection of the growth of large-scale structure, using weak gravitational lensing and photometric redshift data from the COMBO-17 survey. Deep R-band imaging of two 0.5×0.5 square degree fields is used to provide shear estimates for over 52000 galaxies; these are combined with photometric redshift estimates from our 17 band survey, in order to obtain a 3-D shear field. We discuss how theoretical models for evolving matter power spectra and correlation functions cab be used to find a best fit to this 3-D shear field. We present the detection of the evolution of the power, and measurements of the rate of evolution for 0<z<1. We discuss future refinements which will improve the accuracy with which the effect can be measured.

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